What horse power is this ?

Hey everyone I am new to boating, recently I picked up a boat, trailer, motor set up for pretty cheap, The motor was recently rebuilt says the prior owners at a local marina, none the less I am trying to figure out what horse power the motor is. I am not too familiar with all the lingo in the boat world so the serial charts don't make a ton of sense to me besides it's a Mercury Motor, serial plate number reads 514-5196 now I believe the last four is the date of manufacturer correct? so it's a 1996 motor. the cap says Mercury 75 it is not faded there is no 7.5 so I'm not sure how to tell what the horse is. Any help would be greatly appreciated. :?:

Photos sure would help